Lexmark C920 Service Manual - Page 60
Machine ID Error, Service, Machine ID
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5056-XXX 948 - Machine ID Error 948 Service Machine ID Step Questions/actions 1 Turn the printer off, and wait 30 seconds. Turn the printer on. Did this fix the problem? 2 Are the EPROMs installed correctly? 3 Did replacing the printer controller board fix the problem? 949 - Tray (x) Comm Step Questions/actions 1 Replace the printer controller board. Does this fix the problem? Yes No Problem solved. Replace the printer controller board. Go to step 3. Problem solved. Verify proper installation of the EPROMs on both the printer controller board and the printhead controller board. Go to step 2. Install the EPROMs correctly. Replace the printhead controller board. Yes No Problem solved. Replace the expansion feeder control board for trays 2-5. If the problem is with the highcapacity paper feeder, replace the HCPF board. 2-18 Service Manual
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